N-COUNT-COLL [with singular or plural verb, usually plural]下层阶级;底层社会;草根阶层 Some people use the lower class or the lower classes to refer to the division of society that they consider to have the lowest social status. 下层阶级;底层社会;草根阶层
Education now offers the lower classes access to job opportunities.
教育如今为下层阶级提供了就业的门道。
The black middle class must now reach out with more empathy and concern to the lower class.
黑人中产阶级眼下必须对底层社会倾注更多的同情和关心。
Lower class is also an adjective.
...lower-class families.
下层阶级家庭
Horse-racing was once considered vulgar and lower class in Japan.